{"product_id":"br-4phcz","title":"Br-4PhCz","description":"\u003ch2 id=\"product-oneliner\"\u003eSelf-Assembled Monolayer (SAM) Molecule for High Efficiency Perovskite Solar Cells\u003c\/h2\u003e\n\u003cp class=\"text-center\"\u003eHole transport layer for \u003cem\u003ep-i-n\u003c\/em\u003e perovskite solar cells, hole selection layer (HSL), Br-4PhCz, (4-(8-Bromo-11H-benzo[a]carbazol-11-yl)butyl)phosphonic acid\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"text-center\"\u003e\u003ca href=\"#overview\"\u003eOverview\u003c\/a\u003e | \u003ca href=\"#specifications\"\u003eProduct Information\u003c\/a\u003e | \u003ca href=\"#msds\"\u003eMSDS\u003c\/a\u003e | \u003ca href=\"#literature\"\u003eLiterature\u003c\/a\u003e | \u003ca href=\"#related-products\"\u003eRelated Products\u003c\/a\u003e | \u003ca href=\"#technical-support\"\u003eTechnical Support\u003c\/a\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eBr-4PhCz is a carbazole-based \u003ca href=\"https:\/\/www.ossila.com\/pages\/sam-perovskite-solar-cells-pscs\" title=\"self-assembled monolayer\" rel=\"noopener\" target=\"_blank\"\u003eself-assembled monolayer material\u003c\/a\u003e designed for high-efficiency organic, perovskite and all-perovskite tandem solar cells. Br-4PhCz features an asymmetric structure with a brominated 11H-benzo[a]carbazole terminal, a butyl linker and a phosphonic acid anchor. Br-4PhCz shows a large dipole moment 4.32 \u003cem\u003eD\u003c\/em\u003e which is critical for efficient hole extraction to speed up carrier transport and reduce interfacial recombination. Br-4PhCz adopts a face-on molecular orientation to the active layer with uniform substrate coverage to suppresses interfacial non-radiative recombination. Also, Br-4PhCz gives a suitable HOMO energy level of −5.32 eV with an exceptionally high hole mobility of 4.16 × 10\u003csup\u003e−4\u003c\/sup\u003e cm\u003csup\u003e2\u003c\/sup\u003eV\u003csup\u003e-1\u003c\/sup\u003es\u003csup\u003e−1\u003c\/sup\u003e.\u003c\/p\u003e\n\u003cp\u003eAs a result, binary OSC based on PM6:eC9 active layer using Br-4PhCz as the hole selection layer (HSL) exhibits a champion efficiency of 19.70% with a remarkable \u003cem\u003eJ\u003csub\u003eSC\u003c\/sub\u003e\u003c\/em\u003e of 29.20 mA cm\u003csup\u003e−2\u003c\/sup\u003e and a \u003cem\u003eV\u003csub\u003eOC\u003c\/sub\u003e\u003c\/em\u003e of 0.856 V while the unencapsulated device retains 95.0% of its original efficiency after 1,000 hours of storage at air ambient, indicating excellent long-term stability. Moreover, impressive open-circuit voltage of 1.36 V is observed in wide band-gap (WBG) perovskite solar cells (PSCs) with a bandgap of 1.77 eV with maximum power conversion efficiencies of 29.35% (certified 28.98%) in all-perovskite tandem solar cells.\u003c\/p\u003e\n\u003cp\u003eServing as hole selective contact for organic solar cells and perovskite solar cells, Br-4PhCz is an alternative to \u003ca href=\"https:\/\/www.ossila.com\/collections\/pedot\" title=\"pedot:pss\" rel=\"noopener\" target=\"_blank\"\u003ePEDOT:PSS\u003c\/a\u003e with superior performance and the convenience of solution deposition at low concentration, i.e. 1 mM.\u003c\/p\u003e\n\u003ch2 id=\"specifications\"\u003eGeneral Information\u003c\/h2\u003e\n\u003chr\u003e\n\u003ctable style=\"width: 99.9677%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eCAS Number\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003en.a.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eChemical Formula\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003eC\u003csub\u003e20\u003c\/sub\u003eH\u003csub\u003e19\u003c\/sub\u003eBrNO\u003csub\u003e3\u003c\/sub\u003eP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eMolecular Weight\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003e432.25 g\/mol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eAbsorption*\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003eλ\u003csub\u003emax\u003c\/sub\u003e = 312, 347, 365 nm (in ethanol); 318, 353, 370 nm (in film)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eFluorescence\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003eλ\u003csub\u003eem\u003c\/sub\u003e (n.a.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eHOMO\/LUMO\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003eHOMO = -5.51 eV, LUMO = -2.29 eV [1]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eSynonyms\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003e\u003cspan\u003e BrBACz, (4-(11H-Benzo[a]carbazol-11-yl)butyl) phosphonic acid\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\" style=\"width: 38.212%;\"\u003eClassification or Family\u003c\/th\u003e\n\u003ctd style=\"width: 61.4946%;\"\u003e\n\u003cspan\u003eBenzo[a]carbazole \u003c\/span\u003ederivatives, Self-assembly monolayers, Hole transport layer, Hole selection layer,\u003cem\u003e p-i-n\u003c\/em\u003e Perovskite solar cells, Tandem solar cells\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003chr\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003ePurity\u003c\/th\u003e\n\u003ctd\u003e\n\u003cspan\u003e ≥98%\u003c\/span\u003e (HPLC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eMelting Point\u003c\/th\u003e\n\u003ctd\u003en.a.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth width=\"38.2%\"\u003eAppearance\u003c\/th\u003e\n\u003ctd\u003eOff-white powder\/crystals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"panel panel-default\"\u003e\n\u003cdiv class=\"panel-body\"\u003e\n\u003ch3\u003eSolution Processing Procedure\u003c\/h3\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cem\u003eTypical processing solvents:\u003c\/em\u003e Methanol, ethanol. IPA, DMF\u003cbr\u003e\u003cem\u003eTypical suggested concentration: \u003c\/em\u003e1.0 mg\/ml or 1.0 mM\u003cbr\u003e\u003cem\u003eTypical processing procedure: \u003c\/em\u003eBr-4PhCz is dissolved in ethanol at a concentration of 0.3 mg\/ml. The solution is then spin-coated onto a clean and ultraviolet-treated ITO or FTO substrate surface for 30 seconds at 3,000 rpm, followed by annealing for 4 min at 100 ℃. The ITO\/SAMs substrate is then dynamically washed twice with the same SAM solution. (from device fabrication, \u003ca href=\"https:\/\/doi.org\/10.1002\/anie.202401518\" title=\"BrBACz, Br-4PhCz\" rel=\"noopener\" target=\"_blank\"\u003eDOI: 10.1002\/anie.202401518\u003c\/a\u003e\u003ca href=\"https:\/\/doi.org\/10.1002\/adma.202504520\" title=\"4-phcz\" rel=\"noopener\" target=\"_blank\"\u003e\u003c\/a\u003e). Or Br-4PhCz (0.5 mg\/mL in ethanol) is spin-coated on ITO substrates at 3000 rpm for 30 s and annealed at 100 °C for 10 min (from device fabrication, \u003ca href=\"https:\/\/doi.org\/10.1002\/adma.202523338\" title=\"br-4phcz, brbacz\" rel=\"noopener\" target=\"_blank\"\u003eDOI: 10.1002\/adma.202523338\u003c\/a\u003e). \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eChemical Structure\u003c\/h2\u003e\n\u003chr\u003e\n\u003cfigure\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/br-4phcz-brbacz-chemical-structure-body.png.png\" title=\"br-4phcz chemical structure\" target=\"_blank\"\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/br-4phcz-brbacz-chemical-structure-body_320x240.png?v=1778677742\" alt=\"br-4phcz, brbacz\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cfigcaption\u003eBr-4PhCz, (4-(8-Bromo-11H-benzo[a]carbazol-11-yl)butyl)phosphonic acid chemical structure\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003ch2 id=\"msds\"\u003eMSDS Documentation\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/downloads.ossila.com\/msds\/br-4phcz.pdf\" title=\"br-4phcz MSDS Sheet\" target=\"_blank\"\u003e\u003cimg alt=\"br-4phcz MSDS Sheet\" class=\"msds-icon\" height=\"39\" loading=\"lazy\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/product-downloads-msds.svg\" width=\"30\"\u003eBr-4PhCz MSDS Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 id=\"literature\"\u003eLiterature and Reviews\u003c\/h2\u003e\n\u003chr\u003e\n\u003col\u003e\n\u003cli\u003eX. Yu et al. (2024), \u003cem\u003eSelf-Assembled Molecules with Asymmetric Backbone for Highly Stable Binary Organic Solar Cells with 19.7 % Efficiency,\u003c\/em\u003e Angew. Chem. Int. Ed., 63 (18), e202401518; \u003ca href=\"https:\/\/doi.org\/10.1002\/anie.202401518\" title=\"BrBACz, Br-4PhCz\" rel=\"noopener\" target=\"_blank\"\u003eDOI: 10.1002\/anie.202401518\u003c\/a\u003e.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eJ. Wang et al. (2026), \u003cem\u003eAsymmetric Self-Assembled Molecule With High Dipole Moment for Efficient Wide-Bandgap Perovskite Solar Cells and Tandems,\u003c\/em\u003e Adv. Mater., 38 (13), e23338; \u003ca href=\"https:\/\/doi.org\/10.1002\/adma.202523338\" title=\"br-4phcz, brbacz\" rel=\"noopener\" target=\"_blank\"\u003eDOI: 10.1002\/adma.202523338\u003c\/a\u003e.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 id=\"related-products\"\u003eRelated Products\u003c\/h2\u003e\n\u003chr\u003e\n\u003cp\u003e[[collection handle=\"self-assembled-monolayers\" limit=\"5\"]]\u003c\/p\u003e\n\u003cdiv class=\"collection-container\"\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/self-assembled-monolayers\"\u003e\n\u003cdiv class=\"collection-button background-light-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/self-assembled-monolayers-collection-design.png?width=150\" loading=\"lazy\" height=\"109\" alt=\"Self-Assembled Monolayers (SAMs)\"\u003e\n\u003cp\u003e\u003cstrong\u003eSelf-Assembled\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eMonolayers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/perovskite-materials\"\u003e\n\u003cdiv class=\"collection-button background-ossila-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/collection-link-Perovskite-Materials.png?width=150\" loading=\"lazy\" height=\"109\" alt=\"Perovskite Materials\"\u003e\n\u003cp\u003e\u003cstrong\u003ePerovskite Materials\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"collection-tile\"\u003e\u003ca href=\"https:\/\/www.ossila.com\/collections\/semiconducting-molecules\"\u003e\n\u003cdiv class=\"collection-button background-light-blue\"\u003e\n\u003cimg width=\"150\" src=\"https:\/\/www.ossila.com\/cdn\/shop\/files\/collection-link-Semiconducting-Molecules.png?width=150\" loading=\"lazy\" height=\"109\" alt=\"Semiconducting Molecules\"\u003e\n\u003cp\u003e\u003cstrong\u003eSemiconducting\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eMolecules\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ossila","offers":[{"title":"250 mg","offer_id":51681679442136,"sku":"M2598A1-250mg","price":345.0,"currency_code":"USD","in_stock":true},{"title":"500 mg","offer_id":51681679474904,"sku":"M2598A1-500mg","price":540.0,"currency_code":"USD","in_stock":true},{"title":"1 g","offer_id":51681679507672,"sku":"M2598A1-1g","price":870.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0287\/files\/br-4phcz-brbacz-chemical-structure-title.png?v=1778674703","url":"https:\/\/www.ossila.com\/products\/br-4phcz","provider":"Ossila","version":"1.0","type":"link"}